LeetCode Daily #4 | 1658. Min Operations to Reduce X to Zero
kawaki
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LeetCode Daily #4 | 1658. Min Operations to Reduce X to Zero
39 просмотров · 6 дней назад
kawaki
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39 просмотров · 6 дней назад
LeetCode Daily — Day 4/365 🚀
Today I solved LeetCode 1658: Minimum Operations to Reduce X to Zero.
In this video, I explain THREE different approaches step by step:
🔹 Brute Force — start with the straightforward approach and check the possibilities
🔹 Better Approach — optimize the solution using Binary Search
🔹 Best Approach — use Sliding Window to achieve an O(n) solution
I explain the intuition behind each approach, how we improve from one solution to the next, and the complete C++ implementation.
💡 Key Idea of the Best Approach:
Instead of removing elements from the left and right, we can think about the problem as finding the longest subarray whose sum is:
totalSum - x
Then:
Minimum Operations = n - length of the longest valid subarray
📌 Problem:
https://leetcode.com/problems/minimum...
⏱️ Chapters:
00:00 Brute Force Approach
09:00 Better Approach — Binary Search
20:00 Best Approach — Sliding Window
📚 Topics:
• Arrays
• Prefix Sum
• Binary Search
• Sliding Window
• Two Pointers
• C++
⏱️ One problem. One video. Every day.
This is Day 4 of my 365 Days of LeetCode challenge, where I'm solving and explaining one LeetCode problem every day
If you're preparing for DSA, coding interviews, or competitive programming, follow along!
#LeetCodeDaily #LeetCode #DSA #SlidingWindow #BinarySearch #CPlusPlus #Coding #Programming #365DaysOfLeetCode